package com.itheima.reggie.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.exception.BussinessException;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Transactional
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressService addressService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Override
    public void submit(Orders orders) {
        //获取当前用户id
        Long currentId = BaseContext.getCurrentId();
        //获取购物车数据
        LambdaQueryWrapper<ShoppingCart> lqw=new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lqw);
        if(shoppingCarts==null||shoppingCarts.size()==0){
            throw new BussinessException("购物车为空，不能下单");
        }
        //向订单表中插入数据，一条
        //根据用户id查询用户信息
        User user = userService.getById(currentId);
        //查询地址信息
        AddressBook addressBook = addressService.getById(orders.getAddressBookId());
        //向订单明细表中插入多条数据
        if(addressBook==null){
            throw new BussinessException("用户地址信息有误，不能下单");
        }
        //在保存订单信息之前，需要给order的各个属性赋值
        long orderId = IdWorker.getId();
        AtomicInteger amount=new AtomicInteger(0);
        List<OrderDetail> orderDetails=shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail=new OrderDetail();
            //给OrderDetail的各项数据进行赋值
            orderDetail.setName(item.getName());
            orderDetail.setOrderId(orderId);
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        orders.setNumber(String.valueOf(orderId));//订单号
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());//结账时间
        orders.setStatus(2);//待派送订单
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        //求总金额，需要从购物车将订单中每个菜品进行遍历，然后将金额加起来
        orders.setUserId(currentId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());//收货人
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getProvinceName()==null?"":addressBook.getProvinceName()
                + addressBook.getCityName()==null?"":addressBook.getCityName()
                +addressBook.getDistrictName()==null?"":addressBook.getDistrictName());
        this.save(orders);//将以上信息添加到订单表中
        //向订单明细表中插入多条数据
        orderDetailService.saveBatch(orderDetails);
        //删除购物车数据
        shoppingCartService.remove(lqw);
    }
}
